Dust sprayer



W. W. GORE DUST SPRAYER Nov. 13 1923.

Filed July 10, 1922 m GM, v h w: h LL 1 [V \n 71 7 m 1v \MW u! H .ixflx Q m 5 numwhnlwm, a l I! 1 mw In N i 1 i x WARREN W. GORE, OE MADISON, 'WISCQNSEN, rlSSIGHOR '319 8r. EUHNSON MPG. 00., F MADISON, V/ISCGNSZIN, A CGBLPGRATEON GE WISCDNSIIT.

DUST

- Application file July 10, 1922. serial 2T0. 574,010.

To all to 720m it may concern:

Be it known that l, Vl ARREN d (ions, a citizen of the United States, residing at Madison, in the county of Dane and State of Wisconsin, have invented certain new and useful Improvements in Dust Sprayers, of which the following is a specification.

This invention relates to dust-spraying machines of that type which are designed and adapted to spray vermin fungus and insect-destroying powder on trees, bushes, shrubs and plants through the use of a rotary fan or blower; the machine of the present invention being designed mainly for dusting fruit trees and field crops.

In two co-pending applications filed by me on the th day of July, 1922, Serial Nos. 574,008 and 57 L009, I have disclosed dust ing machines comprising a gas engine, a rotary fan driven by the engine, and a dust hopper all rigidly united in a single unitary structure which may conveniently be mounted on the frame or floor of a vehicle for transporting the same through the orchard or field. The machine of my present invention embodies the same broad structural features, but differs from the machines of the aforesaid applications in respect to several specific details of structure and organization. In the machines of said applications the dust hopper is arranged to deliver the powder or dust to acurrent of air heated by the engine in its passage to the intake side of the fan, so that the commingled air and dust pass through the fan, the object being to absorb any moisture in the powder or dust and thus produce a drier and more finely dividedcondition of the latter. In the machine of my presentinvention the air delivered by the fan is preheated by the engine, but the powder or dust is delivered to the air on the discharge side of the fan. Also in the aforesaid applications I have disclosed the use of an air-cooled gas engine, wherein the air induced by the fan is preheated by contact with the walls of the cylinder, or with an exhaust heater disposed across its path of flow, or both. in the machine of the present invention 1 show an arrangement well. adapted to the use of a water-cooled gas engine; the preheating of the air being effected by an exhaust heater located in the path of the air flowing to the intake side of the fan.

that the invention may be clearly .el by persons skilled in the art, ia in tae accompanying drawing, illustrated a practical and approved embodiment thereof; and referring thereto- Fig. l is an elevation partly in v rtical section, of the combined engine, fan and exhaust heater;

Fig. 2 is a side elevation of the complete outfit viewed from the rightof .u l and showing also the delivery pipe of thefan with the dust hopp r mounted thereon; and

Fig. 3 is a sectional plan of the discharge valve and agitator of the dust hopper, taken on the line 3-3 of Fig. 2.

Referring to the drawing, l3 designates as an entirety a. base-frame or pedestal which constitutes a support or rest for the complete machine, the same being provided with apertured ears or lugs 5 by which it may readily be secured the floor of the vehicle. Rigidly mounted on the base B is an upright gas engine, herein shown. as of the, water-cooled type, and designated as an entirety by E. This engine has cranlc case 6, to one side of which is rigidly secured the casing F of a rotary fan or blower of the well-known tangential delivery type, said casing being bolted to the base at 5. The inner wall of the fan casing has the usual central suction opening 8, and integral with or otherwise secured to said inner side wall is a short lateral extension that forms a flywheel chamber 9 to accommodate the engine fly-wheel 10, and an upper heater chamber 11 in which is disposed a device for preheating the air flowing to the fan by means of the exhaust of the engine, and hereinafter more particularly described. The upper chamber 11 communicates with the fly-wheel chamber 9 through a central opening 12.

designates the horizontal discharge or l very pipe of the blower which securely ted to the base B, as indicated at 5" in l i and on the upper side of the pipe 13 l a neck 1% on which is supported and secured the dust hopper In the throat of the hopper H is a discharge mechanism for the powder or dust, which may be of any particular or approved type, preferably capable of being adjusted or graduated so as to vary the amount of dust delivered to the air blast. This mechanism as herein shown comprises a lower valve plate 15 fitted across the throat of the hopper and formed with a group of equally spaced radial holes 16, and an identical superposed plate or disc holes of the lower plate, so that when the upper plate revolved the two series or holes can be brou ht into conialete or tial registration or completely occluded. Any desired or convenient means for adusting the plate 17 may be used. 1) c herein shown a howzontal worm shell; 19

a continuous and uniform flow o agitator or r} hopper (are the to l ying the lower end oil a Yen shaft is driven pulley on the letter. 27 on the overhanging J a shaft 28 ournaled in and across the to of the hop per H and a worm and worn: wheel 29 from shaft 28 to agitator shatt Jr.

The fan 30 is, in the cinbod'nient Oil the invention illustrated, directly driven by the ct ;ine shai't by being mounted on an QX- tension of the latter beyond the iij wheel 10. as clearly shown in Fig. 1.

The air induced by the tan is preheated by the engine exhaust by being caused to ilow through a heater located in the chamber ll. 31. designates a pipe leading from the exhaust of the engine and connected, as by a T-coupling 32, to a pair of oppositely disposed. exhaust pipe extensions Encircling the pipes 33 are a pair 01" hollow grids 34-, the outer ends of which are in tree communication with the atmosphere, while their i his letter slia'rt by a 26, a pulley inner ends are open to the suction eilect of the tan through the chamber 11., port or oi ing 12, and fly-wheel chamber 9. The ds 23 i become highly heated by conduction :rrom the exhaust pipes 33. so that the air drawn through the said grids is sufficiently heated to eiiect a d ing and comminuting action on the powd travel of the commingled air and dust through the hose or delivery pipes and noz- 7h; oi"? the machine. The operation or ictionii oi? the apparatus will be quite e ident :iircio the foregoing description oi its structure. Those advantages which. it has in common with the machine of my aforesaid companion applications reside partly in the simplicity, compactness and unitary character of the structure, and

formed with holes 1? cor- V responding in number and location to the five dusting oi:

or dust during the:

arrays? r es the powd r or dust is a feature oi? great value and advantage in a machine of this character, since the effeceniiu'ely upon in ring the dust ground very iine so that it will adhere to the foliage and s, oi? the plants, and as a-considerable part ot' the material used very readily ab sorbs moisture, some of it being deliquescut, the heated air will absorb any moisturn contaii'ied in the dust, discharging the i in a more finely divided condition .uu adapted to its purpose.

dusting machine, in combination, a base 'i'ranie, verticalgas engine having its cranl: case JlOUIliIQd'Ofl said base frame, a rot;

d base :lraroe, means for heating the air induced by said tan through the agency Oil the engine exhaust, and adust hopper mounted on said discharge pipe and delivering dust to the air flowing through the latter.

2. In a dusting machine, in combination,

a gas engine, a fan driven by said engine and having a discharge pipe, a dust hopper mounted on said discharge pipe and delivering dust to the air flowing through the latter, an air intake chan'iber adjacent to the suction side of said fan, an air heater located in said chamber, and means for passing the exhaust from i said engine through said heater.

In a dusting machine, in combination, a base frame, vertical gas engine having its crank case mounted on said base frame, a rotary fan rigidly connected to one side of said crank case and having a tangential discharge pipe. a dust hopper mounted on said discharge pipe and delivering dust to the air flowing through the latter, an air intake chamber adjacent to the suction side of said fan, an air heater located in said chamber, and a pipe connecting the exhaust of the engine with said heater.

WARREN W. GORE.

the objects treated depends fan rigidly connected on its in- PAIL to one side of said crank case and hav a tangential discharge pipe, said tan he. wen by said engine and supported 

